/byooh'teuh duy"een, -duy een"/ , n. Chem.
a colorless, flammable gas, C 4 H 6 , soluble in alcohol but not in water, usually derived from butane or butene: used chiefly in the manufacture of rubber and paint, and in organic synthesis. Also called bivinyl, vinylethylene .
[ 1895-1900; BUTA(NE) + DI- 1 + -ENE ]